ADM9240ARUZ-R7

Overview

The ADM9240ARUZ-R7 is a microprocessor system hardware monitor in a 24-lead TSSOP package. It provides measurement and limit comparison of six voltage inputs, including two processor core voltages, plus temperature, fan speeds, and chassis intrusion. The device features an I²C-compatible SMBus interface for data access and configuration. Key electrical parameters include a supply voltage range of 2.85 V to 5.75 V, temperature accuracy of ±3 °C over the extended range, and a total monitoring cycle time of approximately 331 µs at +25 °C.

Feature Summary

• Integrates on-chip attenuation for direct measurement of multiple power supplies and processor core voltages without external scaling components.
• Includes a dedicated temperature sensor with high-speed successive approximation ADC for rapid interrupt response to out-of-limit conditions.
• Supports Intel LANDesk Client Manager (LDCM) and maintains register compatibility with LM7x products for simplified integration.
• Features programmable digital outputs for reset control and chassis intrusion detection with internal latching capabilities.

Applications

• Network servers requiring comprehensive hardware health monitoring
• Personal computers needing processor core voltage and thermal management
• Microprocessor-based office equipment with system protection requirements

Procurement Notes

Verify the specific ordering suffix R7 corresponds to the required tape and reel packaging format before procurement. Confirm that the 24-lead TSSOP package dimensions align with the target PCB footprint design. Ensure the supply voltage environment remains within the specified 2.85 V to 5.75 V operational limits during system integration.

Selection Notes

Select this component when a complete hardware monitor solution is needed for microprocessor systems. It is suitable for designs requiring direct voltage sensing of up to six rails, including dual processor cores. The I²C/SMBus interface makes it appropriate for systems utilizing standard serial management buses for centralized monitoring and control.

Part Context

This part belongs to the ADM9240 family of low-cost system hardware monitors. It is designed to replace or complement legacy monitoring solutions by offering integrated attenuation and VID reading capabilities. The device serves as a central node for system health in computing environments where power integrity and thermal safety are critical.

Replacement Considerations

The datasheet notes register compatibility with LM7x products. Verify pinout and register mapping differences if substituting from other manufacturers' hardware monitors. Ensure the replacement supports the required VID input count and fan tachometer interfaces.

FAQ

How does the ADM9240 handle processor core voltage monitoring?

It includes two dedicated analog inputs (+VCCP1 and +VCCP2) capable of monitoring processor core voltages directly, supported by five digital VID inputs for reading core voltage identification bits.

What is the function of the Chassis Intrusion (CI) pin?

The CI pin acts as an active-high input to latch chassis intrusion events. It can also provide an internal open-drain output pulse to reset an external chassis intrusion latch.